Portland Design Works Gravity

Product Details

Portland Design Works Gravity

Portland Design Works' Gravity Tail Light has a built-in accelerometer that detects deceleration or swerving and automatically changes to a super bright, solid beam to warn following traffic. To allow the accelerometer to calibrate, always install the Gravity on your bike before powering it on. Hold the power button down for 1 second to turn the light on or off. Then, keep your bike still for 1 second after pressing the power button to complete the calibration.

The Gravity Tail Light has a redesigned mount that works with the included seatpost and seatstay brackets.